in the middle of 18 acres known as the president's park, the white house has been home to each of america's chief executives since john adams, with west and east wings added. it has undergone many changes, but the courthouse still remains a place of them recognized. divided into public and private sections, its ground and first floors are open for tours. above that are the private quarters of the family. inside the central mansion, there are 132 rooms, with a floor plan that unites the ground, state, and second floor with a centrally located oval shaped room. on the ground floor in the central space is the diplomatic reception room, with the map room, library, and china rooms complementing it on either side. one floor up is the state floor, anchored by the blue room in the center, with the state dining room at 1 did the hall, the east room at the other, and the red and green rooms of to either side of the blue state parlor. on the second-floor private residence, the yellow oval room is the central space, ordered by the treaty room, lincoln bedroom, and the queen's room to the east of it.